They look awesome Joe! That one on the right might have some sort of highlighter mutation going on with it. As far as Bell/NERD compatibility in caramels, I'm almost certain the individual who told you that got one or the other confused with ultramels. If that's what the person you got them from told you, I'd stick with that. Then again, you could try to figure out who the breeder was that hatched your male if you still have contact info for that person if you are still doubtful about their lineage. I'm curious now as to how your breeder male looked as a hatchling, and if he looked more like the girl on the right or the ones on the left though.